Home / 72,918,963.60-109,360,949.40-42,146,998.80

Finding the Fourth Proportional to 72,918,963.60, 109,360,949.40 and 42,146,998.80

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Solution

The fourth proportional to 72,918,963.60, 109,360,949.40 and 42,146,998.80 is: 63,210,385.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,918,963.60 : 109,360,949.40 = 42,146,998.80 : x
  2. Step 2: Convert to fraction form
    72,918,963.60/109,360,949.40 = 42,146,998.80/x
  3. Step 3: Cross multiply
    72,918,963.60x = 109,360,949.40 × 42,146,998.80
  4. Step 4: Simplify right side
    72,918,963.60x = 4,609,235,803,128,661
  5. Step 5: Solve for x
    x = 4,609,235,803,128,661/72,918,963.60
  6. Step 6: Final answer
    x = 63,210,385.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.